DISCUSSION OF THE CONVERGENCE PROPERTIES OF THE PERTURBATION SERIES USED IN THE CALCULATION OF EBIC- AND CL-CONTRASTS W. HERGERT, L. PASEMANN and S. HILDEBRANDT J. Phys. IV France, 01 C6 (1991) C6-45-C6-50 DOI: 10.1051/jp4:1991608